A complete Audio system comprises of many different audio devices. As the space inside a vehicle is limited, audio devices should be portable and easy to install. All audio devices must be able to support playback from secure or protected audio files. The entire list of audio devices consist of the following:

• Mini speaker, which are compatible with CD player, PC/MAC, MP3 Player, MP4 player and DVD player.
• Auto adapter, a device that allows iPods to be connected to car audio systems in some models of cars. The device also allow users to view playlists or song tracks and also charge their iPod.
• Subwoofer, which produces great sound effect.
• Car kits containing holder, charger and frequency FM radio.
• MP3 players are digital audio players used for storing, organizing and playing digital music files. Also used for downloading music from Internet.
• Microphones are mainly used for better hearing.
• Portable speakers, powered with battery produce great sound and help to enjoy music even while traveling.
• USB power cord supplies power to the car audio devices and is compatible with any audio device.
• Audio switch devices are used for combining audio signals in scanning, recording,etc. It is a good combination for earphones, speakers and microphones.
• There are some audio devices that allow users to easily download songs from music download sites.